Best way to make a servo tester

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1

if you need to test out a servo, this is code for it, it fully rotates your servo one way, and then the other to make sure its all good

// made by salim sargi
// material needed : arduino board, servo, jumper wires 
// connect the black/brown wire to gnd, the red one to 5v/vcc and the yellow/orange one to pin 3, output

// this code allows you to test your servo by making it slowly fully turn counter clockwise and then fully clockwise.
#include <Servo.h> 
int servoPin = 3; //the pin that the servo will be attached to 
Servo Servo1; // creates a sevo object
int dec = 5; // this determines by how much the servo will turn each 100 ms, of 5 degrees 
int val = 5; // this determines the position of the servo
void setup() { 
   Servo1.attach(servoPin); 
}
void loop(){ 
   Servo1.write(val); 
  val = val + dec ;
    delay(100);
  if (val == 180) {
    dec = dec * (-1);
  }
// if the servo has fully turned, this allows it to turn the other way
  if (val == 0) {
    dec = dec * (-1); 
  }
  // if the servo has fully turned, this allows it to turn the other way
}
// end of code
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2

You can use WOKWI.COM to show a simulation of your code.

3

Enhancement - add three potentiometers, for magnitude of sweep, speed of sweep, and centerpoint of sweep. Or, add an LCD and make those three variables you can modify using a few buttons.
Just a thought.

4

I have found that someof the the little Chinese servos do not like to be stalled for very long before the motor butns out. Therefore until I characterize each one, i will not use their full sweep.

I find the full sweep, experimentally, and write it on the side.

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5

Hence my suggestion for some control over variables, and maybe an LCD readout. Of course, it all depends on how many servos you have to manage.

6

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